XSRETURN_*

[Reinhard Pagitsch]

Hello,
In my XSub first I check something
e.g:
CODE:
{
        if(!foo(b))
        {
        sprintf(tmp1,"Wrong parameter!",);
        sv_setpvn(perror, tmp1, strlen(tmp1));
        XPUSHs(sv_2mortal(newSViv(-1)));
        RETVAL = -1;
        } else
        {
        }
        RETVAL=1;
}
So if I want to avoid these if - else statements can I do the following?
(not working source code)
int foo(int b)
{
   if(b != 1) return 0;
   return 1;
}
int
_baar(IN x, OUT y, perror)
   int x;
   SV* y;
   SV* perror;
PREINIT:
   char tmp1[256];
CODE:
{
	if(!foo(x))
	{
	sprintf(tmp1,"Wrong parameter!",);
	sv_setpvn(perror, tmp1, strlen(tmp1));
	XPUSHs(sv_2mortal(newSViv(-1)));
	XSRETURN_IV(-1);
	} 

        // some code to fill SV* y
        
        RETVAL = 1;
}
OUTPUT:
y
perror
RETVAL
What I want to have is that if an error ocure that the perror variable will be 
filled with an error message and the XSub returns with -1
mit freundlichen Grüßen,
with my best regards,
Reinhard
--